Development of Concrete Mix Design for Concrete Pavement Using Wastewater Sludge as Partial Substitute to Cement

Abstract

The main objective of the study is to develop a concrete mix design, intended for pavement which uses wastewater sludge as a partial substitute to cement, in order to find an alternative solution for the large volume of sludge generated within the Laguna de Bay Region. Different concrete mix designs with sludge as a partial substitute to cement were evaluated in order to develop an optimum concrete mix design. For which, it must be guaranteed that the resulting concrete design mix has the appropriate flexural strength in accordance with item 311 of DPWH –Standard Specification for Highways, Bridges and Airports. The result shows that as the amount of sludge in a concrete specimen increases, the flexural strength as well as the slumped value that affects its workability decreases.